Factored out code that makes polymer and intra-group bonds into its own
class so it can be reused by the mmCIF parser. Added code to create
polymer bonds in nucleotides.Added support for _struct_conn records in
mmCIF files.
Merge pull request #97 from pwrose/master

Factored out code that makes polymer and intra-group bonds into its own
Reducing jmol output

Adding set/isVerbose methods to JmolPanel and MyJmolStatusListener
to control verbosity (quiet by default)